Lightricks Releases LTX-2.5 With Diffusion-Based VAE Decoder for Open-Weights Video Generation

Lightricks launched LTX-2.5 on August 11, 2026, introducing a novel architecture where the VAE decoder itself operates as a diffusion model rather than a fixed deterministic component. The system uses an aggressive 1:192 spatiotemporal compression ratio and relies on the diffusion video decoder to recover fine details — such as readable text and sharp textures — that high compression typically discards. A second feature called Diffusion Fidelity Rendering allocates compute adaptively across frames and regions based on scene complexity, enabling a 10-second 720p clip to be generated in 6.8 seconds on two NVIDIA GB200 GPUs. LTX-2.5 also replaces smaller T5 or CLIP text encoders with a fine-tuned Gemma 4 12B model paired with a custom prompt enhancer, improving coherence in complex, multi-subject prompts. In Lightricks' own benchmarks, the model achieved an artifact score of 0.28 on a 98-prompt evaluation suite, outperforming Flux 3 at 0.45 and Veo 3.1 at 1.20.